From f29239beecacadd085ef2f8d4e8bb96a47f20466 Mon Sep 17 00:00:00 2001
From: Michael Debertol <michael.debertol@gmail.com>
Date: Sat, 31 Jul 2021 16:15:22 +0200
Subject: [PATCH] sort: buffer writes to the output

This fixes a regression from a33b6d87b578990893257c2b063f8579a3f960c4
---
 src/uu/sort/src/sort.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/uu/sort/src/sort.rs b/src/uu/sort/src/sort.rs
index 1f674e549..13c2c3cfa 100644
--- a/src/uu/sort/src/sort.rs
+++ b/src/uu/sort/src/sort.rs
@@ -36,7 +36,7 @@ use std::env;
 use std::ffi::{OsStr, OsString};
 use std::fs::{File, OpenOptions};
 use std::hash::{Hash, Hasher};
-use std::io::{stdin, stdout, BufRead, BufReader, Read, Write};
+use std::io::{stdin, stdout, BufRead, BufReader, BufWriter, Read, Write};
 use std::ops::Range;
 use std::path::Path;
 use std::path::PathBuf;
@@ -169,15 +169,15 @@ impl Output {
         }
     }
 
-    fn into_write(self) -> Box<dyn Write> {
-        match self.file {
+    fn into_write(self) -> BufWriter<Box<dyn Write>> {
+        BufWriter::new(match self.file {
             Some((_name, file)) => {
                 // truncate the file
                 file.set_len(0).unwrap();
                 Box::new(file)
             }
             None => Box::new(stdout()),
-        }
+        })
     }
 
     fn as_output_name(&self) -> Option<&str> {